Firefox - Using Multiple Profiles

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• Thunderbird - Use Different Profiles

Steps

You can create a new profile with:

firefox -CreateProfile my-profile-name

Then, to launch firefox in that new profile, execute:

firefox -P my-profile-name

You can even set it to automatically open a webpage like so:

firefox -P my-profile-name outlook.office365.com &

References

• Firefox - Command line options - User Profile